Hub-box



UNITED STATES PATENT OFFICE.

JOHN SHAERER, OF READING, PENNSYLVANIA.

HUB-BOX.

Specification of Letters Patent No.

To all whom 'it may concern:

Be it known that I, JOHN SI-IAERER, of Reading, in the county of Berks and State of Pennsylvania, have invented anew and useful Improvement in Box-Fitting Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, forming part of this specification, in which- Figure l is a side elevation of the box fitter. Fig. 2 is a section on line XX through axis of screw. Fig. 3 is a top View.

Similar characters of reference in the several figures denote the same part.

The nature of my invention consists in connecting the progressive boring nut to the frame, so that it may be free to rise; and in placing upon the cutter shaft an adjustable collar; by which construction, after the depth of cutting is marked by the position of the collar, the cut will be carried forward until the collar reaches its seat, when the action of the shaft screw will lift the nut from oif its stop, and the progressive cutting cease, a square shoulder being formed by the cutter during the lifting of the nut. The hub clamps move upon the edges of the bed piece as guides, by the action of a single screw, so that when the apparatus is attached to the hub the axes of cutter shaft and hub will be coincident.

In the drawing B is the bed piece, from which arises the frame C. In the crown of this frame is a nut a, capable of being lifted therefrom; and prevented from turning by a stop c.

D is the cutter shaft, passing through the 16,402, dated January 13|, 1857.

bed, and having its cutter secured in the ordinary manner. The upper portion of this shaft consists of a screw S, moving through nut a, by a lever L. Movable upon the shaft D, is a collar f, secured at any point by a screw g.

F F are the clamps movable simultaneously along the edges of the bed piece B, by the action of the screws on shaft d, so as to clamp the hub and render its axis coincident with that of the cutter shaft.

The operation is as follows: The collar f is secured to the cutter shaft at such a point as will bring it upon its seat m at the terminatio-n of the desired depth of cut. Crank K is then turned; moving the clamps so as to embrace the hub. The turning of shaft D by lever L, produces a progressive cut, until collar f reaches its seat m. Then the rotation of the shaft causes the nut a to rise until it is released from its stop 0,' the cutter making a square shoulder after the progres sive mo-tion of the shaft has ceased. This position of nut and collar is shown in Fig. 2.

Vhat I claim as new and 0f my invention and desire to secure by Letters Patent, is-- The vertically movable nut a, in combination with the cutter shaft D; constructed, arranged and operating substantially as and for t-he purposes set forth.

In testimony whereof, I have hereunto signed my name before two subscribing witnesses.

JOHN SHAERER.

Witnesses: y

GEO. PATTEN, JOHN S. HoLLINGsHEAD. 

